Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (65)	$ (53)	$ (202)	$ (2,189)
Currency translation adjustments	(42)	20	(24)	(151)
Changes in derivative financial instruments, net of tax	(6)	16	(12)	(3)
Comprehensive income (loss)	(113)	(17)	(238)	(2,343)
Net income attributable to noncontrolling interests	4	2	8	6
Comprehensive income (loss) attributable to Company	$ (117)	$ (19)	$ (246)	$ (2,349)